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采用快速加碱法制备了分别以Al13和Al30为主要水解形态的聚合氯化铝PAC-Al13和高聚聚合氯化铝PACAl30。通过向PAC-Al30中引入SO2-4/Al3+摩尔比为0.06的SO2-4离子,制得高聚聚硫氯化铝SPAC-Al30。激光散射粒径分析以及Ferron逐时络合比色结果表明,加入SO2-4后SPAC-Al30的平均粒径增大为4.85 nm,高聚合水解形态Alc含量分别比PAC-Al13和PAC-Al30提高52.7%和17.5%。ζ电位分析以及烧杯混凝实验结果表明,SPAC-Al30的电中和能力不及PACAl30和PAC-Al13,混凝去除水中腐殖酸的效果却有显著提高,且由于SPAC-Al30较为温和的电中和性能,在混凝剂投量较高时不易出现再稳现象。SPAC-Al30的纳米级分子尺寸和高聚合水解形态有利于其发挥更优的吸附架桥和网捕卷扫作用,SPAC-Al30是去除水中腐殖酸的一种新型高效混凝剂。
The PAC-Al13 and PACAl30, which are mainly hydrolyzed by Al13 and Al30, were prepared by rapid alkaline addition. By introducing SO2-4 ions having a molar ratio of SO2-4 / Al3 + of 0.06 into PAC-Al30, a high-poly-sulfoaluminum chloride SPAC-Al30 was obtained. Laser scattering particle size analysis and Ferron time-lapse colorimetric colorimetric results showed that the average particle size of SPAC-Al30 increased 4.85 nm after adding SO2-4, and the content of high polymeric hydrolytic form Alc was higher than that of PAC-Al13 and PAC-Al30, respectively 52.7% and 17.5%. The results of zeta potential analysis and beaker coagulation show that the electrical neutralization ability of SPAC-Al30 is not as good as that of PACAl30 and PAC-Al13. The effect of coagulation to remove humic acid in water is obviously improved. And because SPAC-Al30 is more moderate in electricity, And performance, the coagulant dosage is not prone to re-stabilize the phenomenon. SPAC-Al30 nanoscale molecular size and high polymeric hydrolysis morphology conducive to its play better adsorption bridging and net catch sweeping action, SPAC-Al30 is a new type of high efficiency coagulant to remove humic acid in water.